emmens



2 Sheets-Shet 1.

atto'zmma.

(No Model.)

-S. H.v EMMENS. STEAM JACKHTED KBTTLE.

O. I d e c t a n 6 m a m P 71 4 0O 4 O0 4 0 N.

(No Model.) 2 Sheets-Sheet 2.

. s. H. EMMENS. I

STEAM JAGKETED KETTLE.

No. 484,784. PatentedOct. 25, 1892.

a How 1 Q12,

UNITED STATES PATENT OFFICE.

STEPHEN H. EMMENs, OF LONDON, ENGLAND.

STEAM-JACKETED KETTLE.

SPECIFICATION formingpart of Letters Patent No. 484,784, dated October 25, 1892.

Application filed February 3, 1892. Serial No. 420,235- (No model.)

To all whom it may concern:

Be it known that I, STEPHEN HENRY EM- MENS, a subject of the Queen of Great Britain and Ireland, and a resident of London, England, temporarily residing at Youngwood, VVestmoreland county, Pennsylvania, have invented a new and useful Improvement in Steam-Jacketed Apparatus, of which the following is a specification.

This invention relates, primarily, to apparatus for use in mixing explosives by fusion, but it may be embodied wholly or in part in steam-jacketed apparatus for other uses.

The invention consists in certain novel combinations of parts hereinafter set forth and claimed, and has for its objects to provide for safely using high-pressure steam for jacketing purposes, the more perfect utilization of the heat of the steam, and the convenient and economical construction of the improved jacket which is composed, generally speaking, of a pipe or pipes embedded in grooves in the exterior of the body to be heated or kept hot.

Two sheets of drawings accompany this specification as part thereof.

Figures 1 and 2 of the drawings are vertical sections at right angles to each other of a steam-kettle jacketed according to the present invention, and Fig. 3 is a horizontal crosssection of the same, the planes of the respective sections being represented by broken lines, correspondingly numbered in Figs. 1 and 3. The kettle'is shown in Fig. 2 as provided with acovering O, hereinafter described, which is omitted in Figs. 1 and 3. Fig. 4 is an elevation of a set of the joint castings or couplings by which the sections of pipe are connected in the arrangement represented by Figs. 1, 2, and 3; and Fig. 5 is a sectional elevation of a jacketed kettle, illustrating a modification of the invention.

Like letters of reference indicate corresponding parts in the several figures.

In both embodiments of the invention a suitable metallic pipe A or A in one or more parts is applied to the exterior of the body B or B to be heated or kept heated, so that a passage for steam extends from an inlet I to an outlet 0; and preferably so that such passage is continuous or so formed that the steam shall fiow through the whole length of the pipe employed in forming the jacket. It will be seen that a jacket so formed can be put together with ordinary screw-couplings, and can be readily coupled up to the supplyply-pipe and, if necessary, to an outlet-pipe, and can be supplied with steam from any convenient source and of any required temperature and pressure without endangering the apparatus.

In the preferred construction of steamjacketed kettles represented by Figs. 1 and 4 the substantially-hemispherical kettle-body Bis formed with external grooves of semicircular shape in cross-section andof suitable diameter to be tightly fitted with suitable pipe, thereby securing a maximum surface of contact between the said body B and the jacketing pipe or pipes A, applied thereto. Supposing the said kettle-body to be of iron, the said grooves g are plated with copper or lined with thin sheet-copper, as indicated in Fig. 1, so as to increase the rate of heat conduction between the jacket and the interior of the kettle. To provide for applying pipes of hard metal within such grooves so that they shall be in close contact with the walls of the grooves, such grooves are, furthermore, constructed, as shown in Figs. 1 to 3, in circular sections concentric with each other, or parallel as viewed horizontally, and connected by two cross-grooves g, Figs. 2 and 3, diametrically opposite each other; and the pipe A, in like sections, is put together with the aid of double-T castings t, the vertical stems of which occupy said cross-grooves and right-and-left screw-sleeves s. A set of these couplings is shown detached in Fig. 4. Each set of couplings connects the adjoining ends of two half-rings of pipe fitted to one of the grooves g and the adjacent adjoining ends of the two half rings of pipe fitted to an adjoining groove; and by locating the couplings alternately on opposing sides of the kettle the several rings of pipe are all closed and are coupled together in a continuous series. After the jacketed kettle is otherwise completed, a covering 0 of ashestus, felt, or other suitable material to prevent radiation of heat is applied outside of the jacket of pipes, as represented in Fig. 2. If maximum heating is not required the jacketing-pipe is made in the form of a continuous coil, as represented at A Fig. 5, and is sprung iInto a corresponding continuous groove 9 It will be obvious that other apparatus may be jacketed in like manner, with or without the aid of known expedient-s.

Details which have not been specified may be of any approved description.

Having thus described the said improvement in steam-jacketed apparatus,I claim as my invention, and desire to patent under this specification- 1. The combination, in steam-jacketed apparatus, of a body having external grooves and a jacketing pipe or pipes fitted to said grooves and applied within the same, substantially as hereinbefore specified.

2. In steam-jacketed apparatus, the combination, with a jacketing pipe or pipes, of a body having external grooves fitted to receive said pipe or pipes and lined with a metal of greater conductivity, substantially as hereinbeforc specified.

3. The combination, with a jacketing-pipe in half-rings, of a body having external grooves in concentric circles, connectedby diametrically-opposite cross-grooves and the within-described double- T couplings, and screw-sleeves for uniting the half-rings within said circular grooves and connecting the suc' cessive rings of pipe with each other, substantially as hereinbefore specified.

STEPHEN H. EMMENS.

Witnesses:

NEWTON W. EMMENS, S. W. CALDWELL. 

